Robert naysmith



- R, NAYSMITH.

' DIE FOR WIRE NAIL MAGHINES.

Patented Oct. 24, 1893.

A I n 1 ;//////////////H//// /////////HI a7/////////////////////// I llllllllllllllll lllllllllllllllllllllllllllllllllllll vl UNITED STATES PATENT OFFICE.

I ROBERT NAYSMITH, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE OLIVER & ROBERTS WIRE COMPANY, OF SAME PLACE.

DIE FOR WIRE-NAIL MACHINES.

SPECIFICATION forming part of Letters Patent No. 507,379, dated October 24, 1893.

Applicationfiled December 22, 1892- Serial No. 456,006. CNo model.)

To whom it may concern.-

Be it known that I, ROBERT NAYSMITH, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Dies for Wire- Nail Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which' Figure 1 isafront elevation of my improved die-mechanism, comprising gripping-dies and cutting-dies, the gripper-dies being open. Fig. 2 is a vertical section on the line IIII of Fig. 1. Fig 3 is a view similar to Fig. 1, but showing the gripping-dies closed; and Fig. 4. is a vertical section on the line IV-IV of Fig. 3.

The object of my invention is to provide improved means by which a machine for making wire-nails or rivets can be adapted to make two or more nails or rivets at one operation, and to this end it consists in the combination of two or more pairs of grippingdies set parallel with each other but with their grippers in different planes, and cutters moving transversely to the direction of motion of the gripping-dies.

In the drawings, 2, 3, and 4., 5, are two pairs of gripping-dies set side by side; the dies 2 and 4. may be held stationarily by set-screws 6, while the dies 3 and 5 are adapted to reciprocate between guides 7, being actuated by suitable cam or lever mechanism, not shown. The opposite dies have end-grooves constituting gripping-cavities b, 0, these cavities being in different transverse planes, as shown in Figs. 1 and 3. The purpose of thus locating the dies is to permit the transverse action of the cutters hereinafter described. Each pair of gripping-dies has two cutters, 8, 8, and 9, 9, respectively. The adjacent members of the cutters are connected together and move simultaneously as shown. They are stepped in their positions relatively to each other, so that their cutters 8, 8, will meet at the diecavity 0, while the cutters 9, 9, will meet at the die-cavity b.

The operation is as follows:-By means of suitable feeding mechanism, (not shown,) two parallel wires having been fed forward simultaneously within the gripping-die cavities b, c, are gripped by simultaneous motion of the grippers 3, 5. They are then severed by the cutters 8, 9, which advance in opposite directions and recede. Thereupon, the heading-die, shown by dotted lines in Fig. 3, which is made of diagonal form so as to enter well between the cutters, advances and simultaneously upsets the projectingends of the wires, as shown in Fig. 4:. By retraction of the grippers 3, 5, the wires are then released, and the heading-die retreating, the feeding-mechanism advances the wires the length of one nail. Then the wires having been gripped again, the cutters advance, cut off and point the nails just made, and so the cycle of operations is continued as above described.

The advantages of my invention will be atively to the gripping-dies; substantially as described.

In testimony whereof I have hereunto set my hand.

ROBT. NAYSMITH.

Witnesses:

W. B. CORWIN, H. M. CORWIN. 

